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"Picky Details" for the HP PhotoSmart R707 digital camera
(Timing, Power, and Storage Info)

Timing

When you press the shutter release on a camera, there's usually a lag time or delay before the shutter actually fires. This corresponds to the time required for the autofocus and autoexposure mechanisms time to do their work, and can amount to a fairly long delay in some situations. Since this number is rarely reported on (and even more rarely reported accurately), and can significantly affect the picture taking experience, I routinely measure both shutter delay and shot to shot cycle times for all cameras I test, using a test system I designed and built for the purpose. (Crystal-controlled, with a resolution of 0.001 second.) Here are the numbers I collected for the HP PhotoSmart R707:

HP Photosmart R707 Timings
Operation
Time
(secs)
Notes
Power On -> First shot
3.8
LCD turns on and lens extends forward. About average.
Shutdown
1.5 - 29
First time is time to retract lens, second time is worst-case buffer-clearing time. Fairly fast lens retraction, worst-case buffer clearing is reasonable, given size of buffer.
Play to Record, first shot
1.25
Time until first shot is captured. Fairly fast.
Record to play
1.7/0.25
First time is that required to display a large/fine file immediately after capture, second time is that needed to display a large/fine file that has already been processed and stored on the memory card. Fairly fast.
Shutter lag, full autofocus
0.92/0.95
First time is at full wide-angle, second is full telephoto. On the slow side of average.
Shutter lag, prefocus
0.132
Time to capture, after half-pressing shutter button. Faster than average for its class.
Cycle Time, max/min resolution

1.77 /
1.59

First number is for large/fine files, second number is time for "TV" mode (640x480) images. Times are averages. In both modes, shoots 4 shots this fast, then slows to about 6.5 seconds per shot. Buffer clears in 17/15 seconds. Good speed, and the four-shot buffer will be enough for most consumers.
Cycle Time, Burst mode 0.44
(2.3 fps)
Times are averages. Cycle time is 0.44 seconds for three frames, regardless of resolution. Buffer clears in about 26 seconds, then it's ready for 4 more shots. Pretty fast, but a bit of a wait before you can take the next shot, once the buffer fills. (You have to wait for the buffer to clear completely before you can shoot the next image.)

Shutter lag on the slow side of average, decent shot to shot cycle times. With lag times that range from 0.92-0.95 second, the HP R707's shutter response is on the slow side of average. (Average for a camera of this class is a range from 0.8-1.0 second, which is still too slow for a consumer digicam, in my opinion.) Cycle times are a little better, at 1.77 seconds/shot for up to four shots in rapid sequence. Continuous-mode speed is also good, at 2.3 frames/second, again for up to four shots.


Power

The HP R707 for some reason refused to operate from the lab-bench power supply I use to measure digicam power consumption with, so I couldn't perform my usual detailed measurements. A simple run-down test showed a worst-case run time of 100 minutes, in capture mode with the LCD turned on. Given that the R707 is very aggressive about turning its display off when not in use, actual run times will likely be a fair bit longer. Still, my usual recommendation that you purchase a second battery right along with the R707 stands: Digicam batteries very much obey Murphy's Law, always petering out at the worst possible moment.



Storage Capacity

The HP Photosmart stores its photos in approximately 27MB of internal memory or on SD/MMC memory cards, but no memory card is included with the camera. (I strongly recommend buying at least a 64 MB card, preferably a 128 MB one, to give yourself extra space for extended outings.) The chart below shows how many images can be stored in the internal memory at each size/quality setting.

Image Capacity vs
Resolution/Quality
27 MB Internal Memory
****
(Best)
***
(High)
**
(Normal)
*
(Low)
2,592 x 1,952 Images
(Avg size)
6
4.3 MB
10
2.6 MB
18
1.5 MB
32
824 KB
Approx.
Compression
4:1 6:1 10:1 18:1
2,048 x 1,536 Images
(Avg size)
9
2.7 MB
16
1.7 MB
27
994 KB
46
586 KB
Approx.
Compression
4:1 6:1 10:1 16:1
1,280 x 960 Images
(Avg size)
22
1.2 MB
34
773 KB
52
515 KB
75
356 KB
Approx.
Compression
3:1 5:1
7:1
10:1
640 x 480
Images
(Avg size)
89
300 KB
137
196 KB
205
132 KB
294
92 KB
Approx.
Compression
3:1 5:1
7:1
10:1

 

Download Speed

The HP Photosmart connects to a host computer via a USB interface. Downloading files to my Sony desktop running Windows XP (Pentium IV, 2.4 GHz), I clocked it at 991 KBytes/second. This is about as fast as cameras with USB v1.1 interfaces get. (Cameras with slow USB interfaces run as low as 300 KB/s, cameras with fast v1.1 interfaces run as high as 600 KB/s. Cameras with USB v2.0 interfaces run as fast as several megabytes/second.)

Photosmart R707 Review
Photosmart R707 Test Images
Photosmart R707 Specifications
Photosmart R707 "Picky Details"
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